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प्रश्न
Give a reason why a green deposit is seen on the surface of an article of copper
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उत्तर
The green deposit of the surface of the articles made of copper is seen due to the formation of green copper carbonate.
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संबंधित प्रश्न
State one use of Iron.
Explain how, a reduction reaction of aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved.
What elements are present in steel? How are the properties of steel different from those of pure iron?
Give reasons
Aluminium is used in making aircrafts.
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
______ is a liquid metal.
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
Salt of silver, such as ________ is used for making photographic films.
State two important uses of following metals:
Uses of iron
State two important uses of following metal
Uses of tin
State two important uses of following metal
Uses of lead
State the position of the following in the periodic table:
Aluminium
Write name.
The reagent that dissolves noble metals.
State the position of the following in the periodic table:
Halogens
What is it made from? Why?
Ornaments
Write the name.
Two highly reactive metals-
Electronic configuration of metal A is 2,8,1. Electronic configuration of metal B is 2,8,8,2. Which of the above metals is more reactive? Explain with reason.
Complete the following flow chart.
An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.
Metals and non–metals are used for making ______, ______ and ______.
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
Compare the conductivity of metals and non–metals.
